Spatial Reference System Cartesian Coordinate System https://en.wikipedia.org/w/index.php?title=Cartesian_coordinate_system&oldid=1058613323 https://www.commoncoreontologies.org/InformationEntityOntology A Spatial Reference System that identifies each point in a spatial region of n-dimensions using an ordered n-tuple of numerical coordinates that are the signed (i.e. positive or negative) distances measured in the same unit of length from the zero point where the fixed perpendicular Coordinate System Axes meet. Rectangular Coordinate System